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lots should be rejected and alternative lots tested until a clean lot is located. It is highly <br />• likely that intermediate wheatgrass, vegetatively so similar to western wheatgrass, is <br />mixed in lots of the latter species and accounts for its presence in the reclamation <br />despite express intentions to exclude it. Similarly, smooth brome has sufficient similarity <br />to mountain brome that it may well end up mixed with that species in commercially <br />offered lots of seed. <br />Sample Adequacy <br /> <br />A summary of sample adequacy calculations for the parameters of cover, herbaceous <br />production, and woody plant density is presented in Table 19 (Appendix 1). As can be <br />seen in this table, the data sets for cover in the extended reference areas and the three <br />sampled reclaimed areas all achieved sample adequacy. Herbaceous production data <br />met sample adequacy in all cases except the 1997 reclaimed area. As usually is the <br />case, the woody plant density data were sufficiently variable that with aone-stage <br />sampling design such was used for convenience in this monitoring, no areas met sample <br />adequacy. However, the approximation of means with a small sample was all that was <br />needed to effectively check status of woody plant density in the 2001 monitoring. <br />13 <br />